Position dependent non-contact voltage and current measurement

a non-contact, voltage and current technology, applied in the direction of measurement devices, instruments, measurement using digital techniques, etc., can solve the problems of inaccurate measurement, relatively dangerous step of touching voltmeter probes to stripped wires or terminals

Active Publication Date: 2020-06-09
JOHN FLUKE MFG CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This solution enables precise and safe measurement of electrical parameters by determining calibration factors for varying conductor positions, improving measurement accuracy and eliminating the need for direct contact, thus enhancing safety and reliability.

Problems solved by technology

Besides requiring an exposed wire or terminal for galvanic contact, the step of touching voltmeter probes to stripped wires or terminals can be relatively dangerous due to the risks of shock or electrocution.
In certain instances, the variable position of the conductor under test may negatively affect the measurement of one or more electrical parameters (e.g., voltage, current, power) of the conductor under test, thereby leading to inaccurate measurement results.

Method used

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  • Position dependent non-contact voltage and current measurement
  • Position dependent non-contact voltage and current measurement
  • Position dependent non-contact voltage and current measurement

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Embodiment Construction

[0034]Systems and methods of the present disclosure advantageously provide for calibration of electrical parameter measurement devices, such as contact and non-contact “reference signal” type measurement devices, clamp meters, and split core transformers, as well as conductor position determination for such devices and other devices. Initially, with reference to FIGS. 1A-4, various examples of reference signal type measurement devices are discussed. Then, with respect to FIGS. 5-20, various calibration systems and associated devices and methods are discussed.

[0035]In at least some implementations, the calibration systems and methods disclosed herein may be used to calibrate non-contact measurement devices in which measurement of one or more alternating current (AC) electrical parameters in an insulated wire is performed without requiring a galvanic connection between the insulated wire and a test electrode or probe. The calibration systems and methods may also be used to calibrate c...

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Abstract

Systems and methods for operating and calibrating measurement devices are provided herein. The measurement devices generate reference current signals and sense the reference current signals in a conductor under test, which sensed signals are used to determine a calibration factor or a position of the conductor under test. A calibration system may control a calibration voltage source to selectively output calibration voltages in a calibration conductor. The calibration system may obtain data from the electrical parameter measurement device captured by the electrical parameter measurement device when measuring the calibration conductor. Such data may include one or more reference current measurements, one or more voltage measurements, etc. The calibration system utilizes the obtained measurements to generate calibration data which may be stored on the voltage measurement device for use thereby during subsequent operation. The calibration data may include one or more lookup tables, coefficients for one or more mathematical formulas, etc.

Description

BACKGROUNDTechnical Field[0001]The present disclosure generally relates to electrical parameter measurement devices, and more particularly, to position dependent calibration for electrical parameter measurement devices.Description of the Related Art[0002]Voltmeters are instruments used for measuring voltage in an electric circuit. Instruments which measure more than one electrical characteristic are referred to as multimeters or digital multimeters (DMMs), and operate to measure a number of parameters generally needed for service, troubleshooting, and maintenance applications. Such parameters typically include alternating current (AC) voltage and current, direct current (DC) voltage and current, and resistance or continuity. Other parameters, such as power characteristics, frequency, capacitance, and temperature, may also be measured to meet the requirements of the particular application.[0003]With conventional voltmeters or multimeters which measure AC voltage, it is necessary to b...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): G01R35/00
CPCG01R35/007G01R19/25G01R1/04G01R1/22G01R15/12G01R15/14G01R15/16G01R17/02G01R35/00G01R35/005
InventorSCHMITZER, CHRISTIAN KARLSTEUER, RONALDRODRIGUEZ, RICARDO
OwnerJOHN FLUKE MFG CO INC